Kankakee Daily Journal Obituaries July 2020, Harambe Timeline Split, Articles G

Basically rebuilt most of the engine while in the vehicle. If I put the Range module on, is that all I need to do, both now and long term? Pulled the inntake and replaced valleypan With all the solenoids. Per bulletin 10-06-01-0007b, 2007 L92 had first and 2nd design. 4,7 plugs foul runs rough at idle. I have an 07 Yukon with over 180K. GM offers the following diagnostic steps in determining if this is the problem. [], [] Its a Gen. 4 5.3L iron-block engine, so youre getting the better intake manifold, connecting rods, and ECM. Just shut AFM off. My 5.3 has a vin code of O. Hello! As a side note, Range Technologies recommends removing the disabler between visits to the dealer as they will need to access the OBD-2 port. I got as high as 23mpg on the highway in my 89 K1500 with 350ci and a five speed manual. http://www.autoserviceprofessional.com/article/91652/ticking-gm-v8-lifters-and-dtc. When we removed the oil pan from the new block, we noticed a metal shield covering the bottom of the block. I would just have the AFM disabled (tuned out) then. whith a disabler. Cylinder deactivation works to save fuel, but it may not be for the reasons you think. 8000 grand for the repair mine was 1,700.00 to repair, I had a 2004 small block v8(4.8) 331,000 miles on the truck,it was the usual on the maintenance front axles,etc. Cylinder deactivation--branded Active Fuel Management by GM--shuts off some cylinders when extra power isn't needed, to improve fuel economy. I plan on getting a tuner to disable the AFM. AFM - active fuel management strategy which deactivates the lifters on specific . They layed over night in engine oil before instalation. I switched from gm to dodge in 1984, have had 3 1st gen Durango and 4 2nd gen Dakotas, all used, with impeccable reliability. Now I get 24 to 26 with deactivation locked out and full power. Some drivers want V8 power under their foot at all times. If the lifter actually fails so that the mechanism wont release, it wont work. Getting ready to diy for $450. Nine plaintiffs filed the General . Hello Brian, I just purchased a 2018 Silverado with a 5.3 AFM engine, I have 200 km on it. Don't even get me started on the shortened life of the cooling, starting and charging systems. She drove it for another 35,000 and it went out again. Having a hard time finding one .. Now the problems back, I have 180k miles on it now. In 5th gear on deceleration and 99 for fuel mileage estimate on the dash it still didnt go into 4 cyl mode. He claims that GM used the same engine whether it was or was not equipped with AFM in this year and model? Thats not all bad because it saves the cost of an AFM delete kit. According to some experts, switching to cylinder deactivation reduces the emissions high somewhere between 4 and 10%, which is a huge percentage of saving the air from pollution. i currently get 8 mpg with the vortec 350 and a 4l60, I have a 99 Sub k1500 that i get 16 to 18 hwy loaded lightly, I get about 14 on my 95 Tahoe 2 door with 5.7 and 4l60. Are you saying that I am in the clear by a year and issues fixed? As you said, the ECM was never seeing the AFM so I think youre good to go. Replace the cam or do the delete kit? I only had 81k on the motor. Once I get it back, could I install the Disabler safely. Dave, I also have a 2008 LTZ avalanche with 106,000 I have the exact same symptoms at this point I just want to sell it will the disabler help remove the check engine light wont pass inspection with light on thanks for your help Chris. Dod is the biggest failure sence the 8-6-4 caddie in 1981. Took it in this morning and mechanic said cylinder 6 misfire, he said the lifter hasnt failed. I have a 2014 Silverado with a 5-3. I have an 08 Suburban that is currently getting the lifters replaced a second time within a three month span. Brian, I just purchased and installed a remanufactured L76 AFM engine for my 2007 Suburban. Took it to my dads and he tore things apart and found that I had a lifter that was stuck. 50,000 miles. A bad lifter can be a minor repair if you get it fixed immediately after you hear an issue. This update also saw the usage of cylinder deactivation technology or Active Fuel Management. Dont want to make a move on a new truck or jump to a 2500 yet. It has AMF. You were lucky that it worked. NOT GOOD!! I know I felt the same way. We figured we already had the intake manifold off to install the engine, why run the risk of MIL only to have to removed the intake manifold again without being paid. My Wifes 17 Buick with afm was my attempt to get back to gm. Thanks. I have only put about 600 miles on it and noticed that the oil was a bit low and am hoping that it was that way when I picked it up. The cherry on top is its not saddled with Variable Valve Timing (VVT) or Active Fuel Management (AFM) found on some Gen. 4 engines. Then had to drive the truck back to Tampa from Cheifland Fl. Its not GMs choice to use AFM. TheAFMsystem can be identified by its components. Vehicle has been serviced more regular than the manual calls for and the AFM has caused problem after problem with fouled plugs. I only have ~ 5k miles on it, and it hasnt been driven hard, so Im assuming the lifters are fine. I have 1999 5.3 Silverado that gets 19-20 miles to the gallon all the time this shit pile with dod only gets 14 miles to the gallon. Engines withAFMalso use a special camshaft, a high-volume oil pump, and a pressure relief valve in the oil pan. I did and they diagnosed it as being on Cylinder 3, not one of the cylinders that deactivates. Only thing I noticed with the oil consumption issue. You will get codes thrown if the afm is physically removed without telling the ECM you did so. GM uses 3 different styles all are engine specific. With 44, its a enormous Jon to remove the oil pan. I am not in a position to have a new cam and lifters installed but Im also not in a position to not having a running truck! Please report back if you have any issues, but I think you are in good shape. 2 15 with 5.3 Sierras both with 100k and I had the same issue and had to have the AFM information deleted from the computer and the car tuned. Hello Keith, if your lifters are still in good shape, an AFM Disabler is a good idea. It essentially turns your V8 engine into a V4 which saves fuel. It is usually first noticed during highway driving. Should I buy one to disable the V4 mode? Runs better than new now and no more oil consumpsion!! You are correct. Took it to a shop and they advised that it could be due to the AFM system not functioning properly. But yes ultimately, it might be time for a cam and any AFM lifters that werent replaced. Unfortunately because of emission standards nowadays, manufacturers cant go back to those style of engines. Looking for another Toyota at this point to match my 1985 4 runner with 380.000 miles and no issues since new. I have an 07 Silverado 1500 ltz. 2 15 with 5.3 Sierras both with 100k and I was looking at the 08 escalade hybrid with dod on its 6.0 so wondering if the delete would contribute to the high oil consumption and therefore would adding the deflector be a good idea. You can search our site by engine code to find some of the upgrade articles weve published and more are on the way. The engine also had 799 or 243 casting heads which are closely related to the LS6. An AFM Disabler is an electronic device that plugs into the OBD-II port, under the dashboard. Verified over hundreds of trips, makes no sense. 190k on the motor always ran AMSOIL full synth since new. Thankfull for any ideeas! This valve is located on the oil pan rail and prevents excessive oil pressure from negatively impacting the AFM components. Absolutely agree, but we all know GM cant afford to recall them all & definitely wont, gettin a Toyota, but first will go to GM dealer and ask to see a truck without AFM & when they say they dont have it Ill say See ya, I have an appointment with the Toyota dealer! Always had GMs never anything else till now. another common cause for low OP is the oil pick up tube O ring. I did noticed the oil consumption but it was rare that I would have to add oil. Is the Pressure relief valve replaceable? Brian, I have a 2010 burb with the exact same symptoms and questions as Shawn please help! GM switched over to the 4100 v-8 in 1982. Service manager said nothing else needs to be replaced because the engine has a Teflon coating. The only solution is to replace the entire cylinder head. Next day, fired it up to take the the junk yard and it ran great. The lifter seems to recharge whenever the truck sits for some time. I have read synthetic isnt good for AFM lifters. Although the last oil change I had they offered a more expensive oil that would let me go every 5,000 miles and when this happened I was almost at 4,000 so needless to say I will never do that again. When cylinders are deactivated, the number of crankshaft rotation increases between firing pulses. One the other hand, it came without AFM, VVT, or flex fuel capability. CAM motion says no just have to disable the AFM and VVT with a stock tune as the camshaft is not an aggressive camshaft but a drop in. If under the truck while parked and it is doing it it sounds like it is towards the back of motor. Would you get enough power to drive at freeway speeds? I have a shop 39 yrs . Yeh truck has 5237 miles on it This is my second Avalanche and I never had any issues with either of them. I ordered a electronic disabler for it today. Cylinder misfires (most common sign) Rough idling, poor acceleration, loss of power Check engine light with engine misfire codes Air-to-fuel ratios are either running rich or lean The easiest way to tell that you have an injector problem is through the check engine light and engine codes for misfires. Jasper makes aGM engine that deletes AFM & will warranty the engine to a 100,000 miles parts & labor . Drives way better for my mostly paved road driving. NOTE:If you were in a situation where youve installed the AFM delete kit, but dont have access to a programmera disabler can still be a viable option. AFM sucks Im paying for a truck that has broke down twice replace the cam and lifters and now its broke down again 105000 miles never heard of that in a 350 Chevrolet. I have had some say that it is the valves and others say that it is the cats plugged. 91 GMC Sierra K1500 F44 6.2 NA Plow truck with 7.5ft Leo Plow 94 K3500 CC DRW 6.5TD DE exhaust . Fouls those plugs. Would installing the Disabler solve this? When they are locked into position, they wont wear further and cause issues down the road. Apparently all passkey III keys are not the same,, I bought one that said for 2006 impala assuming all pk3 would be the same, and I could not get it programmed in my saab 9-7,, so how Im waiting on ones that specially said for saab 9-7. hoping they will work. I contacted service manager in Gastonia, NC and he was kind enough to tell me the whole history of the problem.. EPA required better fuel mileage and less emissions and GM, Ford and Honda(V-6) came up with this failed AFM system. It does seem that when they start goingthey go quickly. Everything else looked good. It looks as if Ill need to start saving for a complete AFM delete kit with a new cam. Installed them again, all facing upwards, will know tomorrow if that was the solution.If this is the cause i cant beleve why they arnt build so that it is impossible to install them the wrong way in the plastic holder.And altso that there was no warning or installation advice With the New lifters.If these are the only lifters in the Whole world that must be in It is currently at the dealer having a new long block installed under warranty. I still get a P0336 code every once in a while but still good to drive around town. All these comments on the 5.3 are blowing my mind!!!. Anyway that horrible experiment was in the late 70s early 80s along with those converted Diesel engines..those like the 8-6-4 nonsense were just terrible failures. I am having that done today on my 08 Suburban and its only costing me $225. The original version sprayed oil on the cylinder walls and increased oil consumption. It replaces the AFM components with standard parts. Why cant u just unplug the solenoid on back of engine by oil pressure sensor? The Tundra fares better but the frame has the rigidity of wet spaghetti and the 5.7 has had problems with VVT solenoids and the plastic timing chain tensioners. thank You so much! Keeping the oil changes regular is important and its possible that a previous owner may not have been as diligent as you are. Why cant you stop the send signals from the computer so that the solenoids dont open and the AFM system is never engaged? I have no other engine problems and Id like to fix the issue. . Diablo says yes but they do not provide tunes. [] For more on that, read:How to Delete or Disable Active Fuel Management (AFM) on GM Engines. Now im thinking of buying a disabler asap, am i in the clear to do so without the oil splashing problem? The tune is the best bang for the buck outside a cam swap anyway and what Id recommend. We were getting a code that the cam position sensor was not functioning properly. We believe this confirmed that the AFM has never been operating in this vehicle. Didnt change exhaust nor tune so likely no change in power/torque. I have a 08 6.0L out of a Silverado with an aftermarket oil pan that has no provision for a pressure relief valve. They lasted one year with big problems. Happened to me twice 2009 Silverado, finally deleted DOD and installed a performance cam and lifters. Now I learn about the cylinder deactivation issue and suggestions to add the Range Technology module to deactivate it. As it turned out one of the cam bearings was failing and causing the cam to wobble (my guess) which messed up the AFM and probably some other stuff too. My fear now is not will it happen but when! As a side note, the early ones had a 24x reluctor and plastic chain guide (good) vs. the later ones with 58x and the spring loaded tensioner (not so good). Or not because it is the cast iron block and not he aluminum block? a little burning oil is a minor thing, my main concern is avoiding a multi-thousand dollar repair needed to the motor. GM tried this on cadillacs about 20 years ago and if memory serves me correctly it was a disaster. When an engine is contstantly running on oil that is broken down, it not only wheres out components because of no protection. Took it to the dealer and was told I had a collapsed lifter. I had purchased an extended warranty when I bought the truck new. With 40000 GM claims fuel improvements ranging from 5%-15% depending on the engine. Toyota has their own problems. The engine will operate on 8cylinders, or V8mode, during engine starting, engine idling, and medium to heavy throttle applications. Interesting that gm still hasnt gotten the bugs out of their Volt and now their 2nd attempt. [], [] rugged iron block 6.0L came with VVT, but without Active Fuel Management, which saves you the cost of an AFM delete [], [] The LH6 engine is a 5.3L Gen. IV aluminum engine that replaced the LM4 in 2005. They have plastic casing, so you can imagine what will happen with aged plastic. The engine is close siblings with the LMG which shared many of the same featuresexcept the LMF isnt saddled with AFM. They are taller and have special oil holes. In four-cylinder mode, they act like air springs and allow for smooth operation. Hi my name is noel I am a mobile mechanic and I have a client that was having trouble with the lifters on a 2011 gmc yukon Denali 6.2 I placed the lifters after finishing I still had a problem with cylinder 8,6,3 rocker arms were not moving so I replaced the cam OEM part but still having miss fire on cylinder 6 what should I do to get rid of this problem, [] computer cannot switch over to four-cylinder mode.